Kohler KG2204 Service page 81

Action
 Turn the ECM power ON.
 Connect Spectrum to the ECM in data stream mode.
 Clear the diagnostic troubleshooting code (DTC).
 Start the engine.
Does DTC re-set?
 Check the electronic throttle for a foreign object in the throttle bore or
damaged throttle bore or fly assembly.
Did you find any damage or a foreign object in the bore?
 Turn the ECM power OFF.
 Disconnect electronic throttle connector.
 Disconnect ECM wire harness connector.
 Inspect the electronic throttle connector and ECM wire harness
connector for damage, corrosion, or contamination.
Did you find a problem?
 With the ECM power OFF, check for continuity between the
following:
o Sensor connector pin 1 and ECM connector P27 pin 104.
o Sensor connector pin 2 and ECM connector P26 pin 70.
o Sensor connector pin 3 and ECM connector P26 pin 40.
o Sensor connector pin 4 and ECM connector P27 pin 105.
o Sensor connector pin 5 and ECM connector P26 pin 15.
o Sensor connector pin 6 and ECM connector P26 pin 34.
Does the DVOM show continuity?
 With the ECM power OFF, check for continuity between the
following:
o Sensor connector pin 1 and engine ground.
o Sensor connector pin 2 and engine ground.
o Sensor connector pin 3 and engine ground.
o Sensor connector pin 4 and engine ground.
o Sensor connector pin 5 and engine ground.
o Sensor connector pin 6 and engine ground.
Does the DVOM show continuity?
 With the ECM power OFF, check for continuity between the
following:
o ECM connector P27 pin 104 and ECM connector P27 pin 112.
o ECM connector P27 pin 105 and ECM connector P27 pin 113.
o Sensor connector pin 1 and ECM connector P27 pin 112.
o Sensor connector pin 4 and ECM connector P27 pin 113.
Does the DVOM show continuity?
 Turn off the fuel supply and disconnect the power leads to the fuel
shut-off valves to prevent fuel from inadvertently entering the intake
manifold.
 Turn the ECM power ON.
 Check for voltage between the sensor connector pin 1 and engine
ground.
Does the DVOM show voltage?
 Turn the ECM power ON.
 Check for voltage between the following:
 Sensor connector pin 5 and engine ground.
 Sensor connector pin 6 and engine ground.
Does the DVOM show voltage?
 Replace the throttle. Refer to Section 5.1.
Is the replacement complete?
TP-6903 5/16a
Yes No
Troubleshoot as an
Go to the next step.
intermittent problem.
Remove the foreign
object or replace the
throttle if damage is Go to the next step.
found. Go to the last
step.
Correct the problem
as required. Go to the Go to the next step.
last step.
Repair the open circuit
Go to the next step.
as necessary.
Repair the shorted
circuit to ground as Go to the next step.
necessary.
Repair the shorted
circuit to ground as Go to the next step.
necessary.
Repair the shorted
Go to the next step. circuit to voltage as
necessary.
Repair the shorted
Go to the next step. circuit to voltage as
necessary.
Go to the next step.
Electrical System and Sensor Troubleshooting 81